Having 2 controllers for one position (the approach radar position) throughout the shift period but requiring 3+ controllers for what in reality is 1 ATCO position in the tower seems more than a little odd.
As an interested observer, I think that chosing Shannon Tower for this protest may have been a bit of an own goal as it could in fact show that the tower positions are over-staffed especially compared to UK airports with higher traffic levels!!
I think I read above that the Shannon Approach guys were located in Dublin ?? To give relief to the duty controller in the tower, aren't they going to have a hell of a commute ?
Or maybe I misunderstand DFC's point.